[XviD-devel] Macros ?

[suxen_drol]

On Sat, 22 Feb 2003 21:06:14 +0100 (CET) Christoph Lampert <chl at math.uni-bonn.de> wrote:

> 
> Hi,
> 
> in ME we define ABS as a macro
> 
> #define ABS(X) (((X)>0)?(X):-(X))
> 
> which is translated into jumps, not conditional moves (on gcc) or
> bit-arithmetics whereas libc abs() functions should be optimized for the
> corresponding plattform and should always be inline in any reasonable
> compiler. 
> 
> Should we change that? Or is macro faster on Windows?
> Then we could move it to portab.h 

stdlib.h::abs() is faster than ABS() with microsoft vc and gcc, even
though my box doesnt have cmov's

i think we should shift to abs()
> 

-- pete; life is like a box of ammo